In addition to the capability of HAPS to elevate the capacity and coverage of wireless communication systems, HAPS systems can enable computing, caching, sensing, and control. The recent literature features such an interplay of communication and computation and further explores the opportunities stemming from integrating computing services in the HAPS. For example, the work in [1]} demonstrates the powerful performance of vertical front/backhaul links using HAPS to provide high-speed free-space optics (FSO) backhaul links to small cells on the ground. Furthermore, the work in [2]} is the first to propose a cloud-enabled HAPS system, where the authors explore the opportunities and potential applications of enabling cloud computing, edge computing, data offloading, and front/backhauling from the sky. Moreover, [2]} describes the prospects of a cloud-enabled HAPS system in integrating traditional cloud services, among other new possibilities for cloud services, such as management services for satellites, sensors, and transportation. In fact, cloud-enabled HAPS systems allow the network to have smooth scalability, where TNs offload traffic data to the more computationally powerful aerial node (i.e., HAPS) for data processing while allowing a simple design on the ground.
